Tq the



G. A. BETULANDE.R.& N. G. PALMGMN. AUTOMAT'IL TELEPHONE EXCHANGE SYSTEM. APPLICATION FILED MAY 12. 1915 a sun's-slain 11.

lfn ucnfcrs -ILW G. A. ,JETULANDER & N. G. PALMGREN. AUTOMATIC TELEPHONE EXCHANGE SYSTEM. APPLICATION HLED MAY12, i915, 1 95 771, Yatuntvd Aug. 22,1916.

3SHEE1S-SHEET G. A. BETULANDER & N. 3. PALMGREN. AUTOMATIC TELEPHONE EXCHANGE SYSTEM.

APPLICATION FILED MRY 12, I915.

Patented Aug. 22, 19M.

3 SHEETS-SHEET L t f 1. kmx WW2 lml. A

@PA "KTOFEIQE;

GOTTHI'LE ANSGARIUS BETULANDEB, OF stinnnrbmisnnLLAsTADQANnNInsignnNAR PALMGREN, or STOCKHOLM, SWEDEN. ASSIGNORS; 'BY DIRECT zinn vgnsnnnssmullLUiIN'i'LS, TO THE BETULANDER -AUTOIVIATXC TELEPHONE (IZOIWIPAN !,.-I.)11V;1151.;ED, 015

LONDON, ENGLAND.

AUTOMATIC TELEPHONE-EXCHANGE. SYSITEFI.

To all whom it may concern Be it known that we, Go'i'rmnv ANscAnIUs Br:'rUr...\,\'nnu, a subject of the King of Sweden, and resident of villaCastor, Siidertijrus V illastad', in-tlieKingdom of Sweden, and' 'NILS GU'NNAR PALMGIgEN, n sulnect of thc King of; Sweden, and resident of 3336111- girdsgatan S stocliholm, in the Kingtlonisf Sweden, have invented certain new and lise-" ful Improvements in or Relating 6Q Antomatic "'lclcph0ne- Exchange Systems, 'of which the following is a, specification, raference. l'ggillg had' therein to the n-ccompzlnyin; drawings; v I The invcnticn relates to an nutc z phone exchange system such as is (18." in the copcnding applicationScriai N0. J5, filccl'Deccmim-r th, 1913, Of which the present application .isa division.

The. main obj'cct of the 'inventicn isltoproride means for 'cfi'e'cting th efccnncctions in sue-h ystems' by; inaans'of relays only.

vThe nccomimn "i11 'drgiwin' s illustrate circuit rnngem'cnts acccrding I tnthis inof which are shown in. the drawing.v

jnre compcsctl of relays cnl) a series of sclccti'ng relay:

vntionfor (effecting ccnnections between the incoming and outgcing'lines of a g'rcu'p selecting section over 'intern'ie liaw lines arranged in the manner dcscrihed in said application N0. 80792-5. f I v.

Figure-1 shows the znr'zigeinent ht-twcc'n the incc-ming juncticnlinc's and. the. intermediate lineS; Fig. 2 Sl'io rslwv group selectors'which arcrommnn t0 all incoming junctiun linvsa- Fig. nhn'f "1e arrange.- mcnt between the intc lines and the outgoing junctinn lines; togcthcr with a rtcsting device.

For simplicity only three of the incoming junction lines 111." M2, Fig. 1.,fare rcprcscnted. Each junction line 111, 7112- i. adapted to be connccted by means of relays Mil-and through contacts 1.16, 117 to 211; one (if the intermediate lims 1.1 115 only three Be sides, each incoming junctibn line- 111,112 is adapted to he crinnec l by means of two relays 11S and 11,9 and through contacts 122, 123 with one 01'' the other f the gr0upselcctgr s IZOzind'fifL'EigfZ. The latter and consist of 12-4 and a series of auxiliary relays corresponding to the Shecificaticn of Letters Patent Pfi tente Aub "several Selecting relays drawing corresf) 11,2 1,111 a n I? For" the purpose of "c on'tr'clh ngyth rifting internicdip v lii c 113 1 11 lcctor and tocontrol 'thtifcipc h ,Ofjihc comicct ng rclzt'y s, 113 and, 1

prises as many. rel?! -'vi cc= is zrdnptcd tc hef fonhecterl vVilQS (if-the junction. lines l32r-l33 of nny 95 arr d this appiictii) opcriiticn and; the einissicn 0f' cl 1rrc 1 ielays 126. 127,118 and ji lare anbt "d to I eaclf'groLip-selector. In idcljtiqn',ftwo relays 129 anidlBO, Fig. '1, are pr'givi'detl of which is to mark fth ,cbxfrespgnftlihg grmlpsclcctcr a3 cngavgctlfdiirin g, shiftperiod. I Q I Each interni'g'zcliat-c' li'nll, 11:5 Fig. 3, in

- provided ivith three relays' 1:31 bj 'meansrf. wvhich it may be conncctjcdjwith one junction line 132, l33i-n enchgi oup IL II nndJHI 0 through contacts 134:, 135 Thi S th he connected-With the 'se'cg id u mnlines 7 5 and the inner ii'iter ned iz'it' l. ne t0lie 3"c0nnected with the thirkl jnnct The object o' f the tcslting cle the right in Fig. 3 toftest f lines of thcgr'oup' selected 'l') in the zn-nni cntfpf tabli'l are 0 aerated. The'tes n 4 .n v D devic ejrco jnsists of a series of teatu'i switching relays cqrr'spcn n several "testing. ways. 'Eiibh masthq lines 132, 13,3 inczicli II in this page threerelays. vv1T n I; thus, fiin 'id vent the grcugrselectors from s'imultahmslj actuating thc testing device, as .will be explnined more closelv below.

- .The connecting relays 113 and 131 are pro vided with two windings. 144; and 145 the first 144 of which has for its object to effect the attracting of the armature while the other 145 only serves to hold the armature in attracted position. The windings 14-1, Which'inaybe called operating windings, are connected at one side with wires extending along the different horizontal rows of relays and at the other side with wires extending along thedifl'erent vertical rows of relays. Accordingly, in Fig. 1 the operating windings 144 of relays 113 ertaining to a horizontal row are connecter in. parallel with a corresponding horizontal wire 146 while the windings 144 of relays pertaining to a vertical row are connected in parallel with corresponding vertical wire 147. The relays are thus interposed in the crossing points of the different horizontal and vertical wires 1 16 and 117 and may be operated by connecting'the corresponding horizontal and vertical Wires to opposite poles of the battery. In a similar manner the operating windings 111 of the relays 131, Fig. 3, are connected with horizontal and vertical wires 148 and 149.

A third wire (holding or releasing wire) 150and 151 respectively, Fig. 1, and 152 and 151 respectively, Fig. 3, extends along the difi'e'r'ent junction lines and the intermediate lines. When the connecting relays 113 and 131. attract their armatures the locking windings 145 are connected in series with the said Wires through contacts 153 and are then maintained current carrying through these wires during the duration of the exist- 7 g interconnection.

" 1' The intermediate lines 114, 115 are provided with test wires Fig. 3, which, when the-corresponding intermediate lines are en- .gaged, are. connected to earth through a contact 15501 a corresponding connecting "relay 131. The outgoing junction lines 132,

133 have similar test wires 156 which be connected to earth. through contacts 15'? of the connecting relays 131.

1A to the reference numerals it will be ,j noted that similar relays and lines pertaining to 131165211118 group of relays as also cor responding relay contacts and windings are designated, by the same referencenuniei'als.

i In or or to distinguish, similarly designated relays, the relays provided in the same vertical row are called the upper, middle and lowei."?relay respectively and therelays provided in'the same horizontal row are called the first, second and third relay 127, Fig 2,

. 1, .to the battery.

line 111., 112, for instance the upper one of Fig. 1, a circuit is closed extending from .earth at the appertaining wire 15311 through this wire, the contacts of the connecting relays 113 and further, if the first group-selector is disengaged, through contact 159 of relay 119, winding 1150 of relay 118 and contact 161 of relay 129 to the battery. The relay 118 energized upon the closure of that circuit whereby the junction line 111, 112 is connected to the first selector .120 through the contacts A line 1.62, 165-1. 1n the next nioinen lioth line branches 111, 112 are connected to earth in an y preferable manner by means of the ordinary set of repeating relays not shown} operated from the calling substation, a circuit lacing thereby closed extending iironi earth through the line branch 11%, contact of relay 118, Wire 1132, contact 1131 of reand further partly through the relay 126, partly through the wire 11 35 and the winding 161' of the relay .129, Fig.

energizes and marks the appertaining group-- selector as engaged by opening the contact 1131. The relay 12-6, Fig. 2, also opera tes and cuts itself in a locking circuit through contact 167. The relay 127 simultaneously receives current through the contact 168 of the-relay 126. The relay 127, upon operating, closes a circuit extending fromearth at the said relay through contact 169, wire .17 O and winding 166 of relay-129, Fig. 1, to the lmttery. Gonscquentl y, the armature of the relay 129 is maintained in attracted position as long as the relay 127 is energized. T he latter has cut itself in a locking circuit through its contact 173 and the contact 17 1 of the relay 1.28. Upon the energizingof the relay 129 the winding 175 of the relay 118,

Fig. 1, is also cut in elocliingcircuit throughthe contact 176 of the same relay, and: the contact 177 of the relay 129.. The relay 129 simultaneously closes its contact 178 so that, hereafter, the relay 119 may be used to com nee-t another junction line 111, 112 with the second groupselecton' 121. i

Through the energizing of the relay 126, Fig. 2, a circuit is closed extendingfroin earth at the line branch 111, Fig. 1- through this line branch, the contact 123Yot-the cor-f responding'relay 118, wire 163, contact 17S of relay 126, Fig. 2, contact 180 of the first, lower relay 12-1'of the grriup-selecton 120 and the corresponding auxiliary relay 125 to the llattery'l The relay 125 is thereby energized and cuts in the corresponding. relay. 124 through the contact 181. The relay 124, uponenergizing, cuts itself ina. locking 'cii cuit thfoiigh its contact and the contact- 1'69 (if-the relay 127. The auxiliary role;

is simultaneously cut in a locking circu) The relay 1212 thereby the contact .184 of the relay 125.." Through the action of the number switch of the calh ing subscriber the current: flowin in .he line branch 111 is now broken and ii 1:

hite UP certain number of times branch 112 is maintained current-ca r 1:. If, for instance, connection with a one oi the third group 111 is desired the said current is interrupted three tilticw. Upon the first interruption the auxiliary re ay leases its armature. Consetpu-ntly. the next current impulse in the line branch 11 1 ,na through the contact In of the first solo" relay 124, the contact 15 5 of th t'iil'l'kr li ltioing auxiliary relay 1525, the contact at? of the second selecting relay 1:3 and the rurrw sponding auxiliary relay 1:25 to the inittery, The second relays 12 i and 125% are thereby operated in the same manner as the co- .sponding first relays. The third imputaoperates the third relays 124 and 1-1 in the same manner. Thereupon the currents at both line branches 111 and 112 are interrupted the third auxiliary relay 1:25 then releasing its armature, Simultane ueir. the relay 126 deiinergizes thereby closing it lair cuit extending. from earth through the rootact186 of the relay 1213. contact is? ot relay 127, contact 188 of relay 172 and Fun ther parallelly partly through the wirr 1. 4 and the relay 172 of the gro121i-selr3ctor 1:3. partly through the contacts 1W 0! the relay 124 of the group-selector 120. wire 19%. wire 149 and the third. lower relay l-tl. Fig. 3. to the battery. The relay 1'?" oi the group selector 1-21, Fig. energizes upon the closure of that circuit tluxreby tfltA'tilill'iQ' the groupselector 121, it this one is simuh taneously operating. from affecting the test ing device, Fig. 3, at the same time as the gr0up-selector 120., as will he explained more closely below. Further. the third group relay 141, Fig. 3. energizes and connects; tl test wires 156 belonging to the ium-Licn Q 132, 133 of the third group lll through the contacts 140 of the relay 14-1 to the witch ingzs 137 of the testing relays 136.

Supposing now that the first junction line 132, 133 of the third group III engaged. a circuit is then closed extending from earth at the corresponding relay 13] through contact 157. test wire 15th wire 19; the corresponding contact H0 of the third relay 1'11 and the winding 137 of the first testing relay 136 to the battery. The relay 13h) therchv energized. It at the same time for instance the second intermediate line 111. 11.7 is used for a connection in another group there is a current flowing from earth at a corresponding connecting relay 131 through the corn tart 155 of that relay. the correspoiuling wire 154 and the winding, 1238 of the second testing'relay 136 to the battery. .lonscquently, the armature of the relay last mentioned is attracted. Thus. in this instance, connection may be obtained only the third junction lines 132. 133 of the i thirl group.

in order that the relay .3 may he encronly in the nion'ient of the testing of junction lines a contact may be provided w en the said relay and th negative pol oi she battery said Contact. eing ontrolled ft a relay operated. from the groupseiector.

that also the windings 138 may he curnticsa when the testing de ice is: disen l on the eniyrg i etion o!" the relay til the current emitting: rtay 14 2' is cut in at the contact. i 3 of the rciar 111. The relay li'l. upon energizing. clo a circuit ext nding; tron: earth through t. third switching rclay 13th the contact 194 oi the third testing i' hiy 13 3. the wontzu 15%", of the third switching relay 13-9. the contact 1% of the 'n' tfttiitl t inf: rchrv 2111. the contact 1% ol' the corresponding switchuig relay 135'. the contact 196 ot th first testing: relay 13th the contact 11)."; ot' the corresponding switching relay 13. and the contact 197 of the relay 11; to the battery. l pon the closure oi that circuit the third so itching relay 1 15- cuts itself in a locking clit'ltit through its contact 198. At the some time the following two circuits are closed: a. from earth at the relay 1%. Fig. i-.. through contacts 18th 187. 198. 19%). wire 191. wire 14!). Fig. 3. winding Hi of the thirih lower connecting relay 13. the corlcspoinlii switchii 1 l contacts 196. i523. 11W. 195 of the second and first relays i 11 and 13%? and contact 11 1" to the batter i'). from earth :It the relay' 1 through contacts 181i. I 15%. wire 1 1t contact 201 of the upper 11*. Fig. l. the wrrespondingj wire ltti, n? 11 1 of the third. upper com li fi. the orrw hauling wire HT. th *iii litliilg: win- Fig. Ii. contact 193 rehiy 1 1 contacts ii. tilt li -i thiz-ccon=t and tiivat rcys tilt and 131i) and ute i lit? to the but i llpou the rior i'i oi these circuits he third. upper artuUic 'EiE-g rehty 11 Fig. 1. and the third. lower onnecting! rrlay 131. lfi z. it are energized first incoming jll!l(ition no ill, 111. his. 1, being; thereby con nocted to the t ird cniggoingg junction ililt' 132. 133 of the third group 111 through the third intern'iediate line 114. 115. At the same tinii a locking irruit for the said con necting relays closed troni earth at the, releasing wire 1:30 of the first. inli'oining iunction line .11. 112 through this wit-e150. the locking winding; '14:) of the third. upper connecting relay 1133. contact 153. the corre sponding wire 151. the locking winding 145 of the. third. lower connecting relay l3] Fig. 3. contact 153. the (m'responding wire 152 and further to the battery in any preferable manner. for instance as shown at the wire 150. Fig. l.

trolling said circuits and relays for emineeting the testing relays with the test it ires oi? the wanted numerical line group 11: oil as with the test wires of the interim-diam}: lin s.

4. A telephone exchange system having in each groupswitehing section a plurality of numerical groups of outgoing lines, :1 ninnher of incoming lines each adapted to be connected with any one of the lines of said groups, intermediate junction lines provided between said incmning and outgoing lllllfw' and having at their disposal different lines of each numerical group, connecting relz for ell'eoting the connections at both ends of the intermediate lines, a plurz-ilitv of Will!- inon group selectors and relays tor eonneeting the incoming lines with the Selwtors.

A telephone exchang H eteni inning in each groupeivitrhing section a plurality. of numerical groups of outgoing: tines. :i nunrber of incoming lines each adapted to in} conneetei'l with any one of tin groups, intermediate iuncti n f n between said int-liming and having at their dispi of each numerieal grow: for oliwiinp the immune lint-:1 of m d the illiQ'Jl'IlltfkillttB lines, it plurality of groupseieetors eouuron to the inmniing lines nnd IRELzIHS or preientiin; The StlQCtUi'b ironi siinuitiineouely operating the connecting means.

(3. A telephone exchange system having in 12011 group-switching section a plurality of nuinerirul groups: of outgoing lines, a numher of incoming lines eaeh adapted to be connected with any one of the lines of said groups, intermediate junction lines provided between said incoming and outgoing lines nnd having at their disposal different lines of each numerieal group, connecting means for eli'ei-ting the eonnertions at both ends of the intermediate lines two group-selectors common to tile: ncom ng: lines, two corre- 1-apondii2 rnlzn'e :ninptnd to preren! mid neleeiow i'ro'zn unu mieousl r operating! the eonnerting' n: ..u,- and means For opening the eirruit of one oi mid rel by operating the other elay.

in \tliiiirfnlu reoil we signed 

